Datex-Ohmeda Aespire 7900 User's Reference Manual
  1. Manuals
  2. Brands
  3. Datex-Ohmeda Manuals
  4. Medical Equipment
  5. Aespire 7900
  6. User's reference manual

Datex-Ohmeda Aespire 7900 User's Reference Manual

Hide thumbs Also See for Aespire 7900:
Table of Contents

Advertisement

Quick Links

Download this manual
Aespire 7900
User's Reference Manual—Part 2
Setup, Cleaning and Sterilization, Maintenance and Troubleshooting

Advertisement

Table of Contents
loading

Related Manuals for Datex-Ohmeda Aespire 7900

Summary of Contents for Datex-Ohmeda Aespire 7900

  • Page 1 Aespire 7900 User’s Reference Manual—Part 2 Setup, Cleaning and Sterilization, Maintenance and Troubleshooting...
  • Page 2 Datex-Ohmeda recommends that a telephonic or written request for service advice be made to the nearest Datex-Ohmeda Customer Service Center. This Product or any of its parts should not be repaired other than in accordance with written instructions provided by Datex-Ohmeda and by Datex-Ohmeda trained personnel.

  • Page 3: Table Of Contents

    Table of Contents Symbols used in the manual or on the equipment ..... . v 1 Setup and Connections Canister setup ..........1-3 When to change the absorbent .
  • Page 4 User maintenance ......... . 3-2 Datex-Ohmeda approved service .
  • Page 5 flow ........... 6-4 Air and N O .
  • Page 6 S/5 Aespire Continuous suction regulator ....... .6-28 Auxiliary O flowmeter (optional) ....... . .6-28 Warranty 1009-0633-000...

  • Page 7: Symbols Used In The Manual Or On The Equipment

    An Important statement is similar to a Note, but provides a comment of greater emphasis. Other symbols replace words on the equipment or in Datex-Ohmeda manuals. No one device or manual uses all of the symbols. These symbols include: ø ø ø ø...
  • Page 8 Aespire 7900 Variability in steps Vacuum inlet + + + + Plus, positive polarity Suction bottle outlet - - - - O O O O + + + + Minus, negative polarity Flush button 2 2 2 2 Lamp, lighting, illumination...
  • Page 9 Systems with this mark agree with the European Union Representative European Council Directive (93/42/EEC) for Medical Devices when they are used as XXXX specified in their Operation and Maintenance Manuals. The xxxx is the certification number of the Notified Body used by Datex-Ohmeda’s Quality Systems. 1009-0633-000...
  • Page 10 Aespire 7900 viii 1009-0633-000...

  • Page 11: Setup And Connections

    1 Setup and Connections In this section Canister setup ..........1-3 Pneumatic and electrical connections .
  • Page 12 Aespire 7900 Important Datex-Ohmeda strongly recommends that you use O monitoring with this equipment. Refer to local standards for mandatory monitoring. Important European Standard EN 740 and International Standard IEC 60601-2-13/ISO 8835-1 require exhaled volume monitoring, O monitoring (in accordance...

  • Page 13: Canister Setup

    1 Setup and Connections • Monitor the correct operation of all life support and monitoring equipment. • Keep backup manual ventilation available in case the electrosurgical equipment prevents safe use of the ventilator. • Do not use conductive masks or hoses. Canister setup w w w w WARNING Obey applicable safety precautions:...

  • Page 14: When To Change The Absorbent

    Reusable Multi Absorber. Both are removed and installed on the breathing system in the same way. Each canister holds 800 g of loose absorbent. Datex-Ohmeda recommends Medisorb absorbent. Both absorber versions should only be used with air, oxygen, nitrous oxide, halothane, enflurane, isoflurane, desflurane and sevoflurane.

  • Page 15: Removing A Canister

    1 Setup and Connections Removing a canister The absorber canister is available in two versions: Reusable Multi Absorber and Disposable Multi Absorber. Both are removed and installed on the breathing system in the same way. 1. Disposable Multi Absorber canister 2.

  • Page 16: Reusable Multi Absorber Canister Filling

    Aespire 7900 1. Hold the canister by the handle and push on the release latch (1) to unlock the canister. 2. Remove the canister by tilting it downward and off the two support pins. Reusable Multi 1. Turn the canister upside down and, using your thumbs, turn the cover locking ring counterclockwise to unlock it.

  • Page 17: Pneumatic And Electrical Connections

    1 Setup and Connections w WARNING The filters must be in place to prevent dust and particles from entering the breathing circuit. 6. When dry, place a new filter in the bottom of the canister, pour soda lime into the canister and place a new filter over the soda lime before closing and locking the cover.

  • Page 18: How To Install Gas Cylinders (High Pressure Leak Test)

    Aespire 7900 The gas supplies also supply these devices through internal connections: • The venturi suction regulator (optional) • The auxiliary O flowmeter (optional) • Ventilator drive gas Pipeline Inlets Serial port The ventilator has an RS-232C electrical interface. The RS-232C connector allows serial input/output of commands and data.
  • Page 19 1 Setup and Connections 2. Close the cylinder valve on the cylinder to be replaced. 3. Fully loosen the tee handle. 4. Open the cylinder yoke. 5. Remove the used cylinder and the used gasket. 6. Remove the cap from the cylinder valve on the new cylinder. 7.

  • Page 20: Din Cylinder Connections

    Aespire 7900 • Turn off the auxiliary O flowmeter and venturi suction. • Set the system switch to Standby. • Open the cylinder. • Record the cylinder pressure. • Close the cylinder. • If the air or oxygen cylinder pressure decreases more than 5000 kPa (100 psi) in one minute, there is a significant leak.

  • Page 21: Installation Notes

    Cylinder supplies could be depleted, leaving an insufficient reserve supply in case of pipeline failure. Installation notes When the system is installed, the Datex-Ohmeda representative will check the following settings and change them if necessary. wWARNING These settings can only be changed by qualified personnel.

  • Page 22: How To Attach Equipment To The Top Shelf

    Aespire 7900 How to attach equipment to the top shelf wWARNING The top shelf has a weight limit of 34 kg (75 lb). Place the equipment between the straps. Fold the straps over each other and fully tighten and fasten them with the hook and loop surfaces.

  • Page 23: Cleaning And Sterilization

    2 Cleaning and Sterilization In this section Breathing system cleanable parts ....... . . 2-3 Special requirements .
  • Page 24 Aespire 7900 w WARNING Obey applicable safety precautions: • Read the material safety data sheet for each cleaning agent. • Read the operation and maintenance manual for all sterilization equipment. • Wear gloves and safety glasses. A damaged O sensor can 2 2 2 2 leak and cause burns (contains potassium hydroxide).

  • Page 25: Breathing System Cleanable Parts

    2 Cleaning and Sterilization Breathing system cleanable parts 1. Bellows assembly 2. APL Valve Ramp 3. APL Diaphragm 4. Breathing circuit module (O sensor not autoclavable) 5. Absorber canister (reusable only) 6. Flow sensor cover 7. Flow Sensor Module (plastic flow sensors not autoclavable) 8.

  • Page 26: Special Requirements

    Do not use cleaning solvents that are not approved for use with polycarbonates (e.g. CIDEX Plus). CIDEX sterilization Both Datex-Ohmeda and the manufacturer of CIDEX (Johnson & Johnson) have tested this procedure. • CIDEX must be 14 day mixture, with activator vial (REF reorder #2245).

  • Page 27: Procedure

    2 Cleaning and Sterilization • One liter of this solution cleans four (4) flow sensors. Procedure 1. Pull the latch to unlock the flow sensor module from the breathing system. 2. Pull the flow sensor module from the breathing system. 3.

  • Page 28: Remove The Breathing System Bag Hose

    Aespire 7900 4. Submerge the flow sensor and tubes in activated CIDEX solution. Keep the connector dry. 5. Keep the solution in the tubes for the sterilization period. 6. Submerge the flow sensor and tubes in distilled water. Again, do not get the connector wet.

  • Page 29: Remove The Breathing System

    2 Cleaning and Sterilization Remove the breathing system 1. Hold the canister (2) by the handle and push on the release latch (1) to unlock the canister. 2. Remove the canister by tilting it downward and off the two support pins.

  • Page 30: Disassemble The Breathing System

    Aespire 7900 Disassemble the breathing system The breathing system assembly can be disassembled for cleaning, sterilization and part replacement. 1. Remove the breathing system and place on a flat surface. 2. Pull the latch to unlock the flow sensor module from the breathing system.
  • Page 31 2 Cleaning and Sterilization 5. Remove the flow sensors from the module: • Completely loosen the thumbscrew (1). • Pull off the cover (2) from the Flow Sensor Holder (3). • Remove the flow sensor connectors (4) from the Flow Sensor Holder. •...
  • Page 32 Aespire 7900 8. On the manifold assembly, remove the check valves circuit lens (1) by squeezing the latches (2) together and pulling up on the lens. 9. Press at (2) to unlock the ramp (1). Rotate the ramp and remove the tabs from the slots (3) to remove the ramp.
  • Page 33 2 Cleaning and Sterilization 11. Turn over the bellows base assembly, grasp the bellows boot with three fingers in the openings at the points shown and pull straight away to remove it. 2-11 1009-0633-000...

  • Page 34: Disassemble The Bellows Assembly

    Aespire 7900 12. With the breathing system removed, the exhalation valve assembly can be removed for cleaning if desired. Loosen the two thumbscrews indicated and lift the assembly off. Disassemble the Bellows assembly The bellows assembly can be disassembled for cleaning, sterilization, and part replacement.
  • Page 35 2 Cleaning and Sterilization 3. Push the latch toward the center and remove the rim. 4. Remove the pressure-relief valve. w WARNING Do not disassemble the pressure relief valve. This can damage the seat or diaphragm and cause injury to the patient. 5.

  • Page 36: Assemble The Bellows Assembly

    Aespire 7900 Assemble the Bellows assembly 1. Install the seal. Verify the arrow on the seal points up. 2. Push the latch toward the center and attach the locking tabs. 3. Install the pressure-relief valve. 4. Push the latch toward the center and install the rim. Verify you hear a double-click when you install the rim.

  • Page 37: Bellows Assembly Tests

    2 Cleaning and Sterilization 5. Attach the bottom edge of the bellows to the rim. Verify only the bottom ring of the bellows is fitted over the rim. 6. Lower the housing and turn it clockwise to lock. Verify you cannot lift off of the housing.
  • Page 38 Aespire 7900 This test makes sure that all components are correctly assembled. It is not an alternative to a complete system checkout. If the bellows assembly operates correctly, complete the assembly of the breathing system. If there is a problem, disassemble the bellows assembly. Look for and replace damaged parts.
  • Page 39 2 Cleaning and Sterilization 3. Remove the plugs from the ports. Permit the bellows to fully extend. 4. Close port 3. 5. Hold the bellows assembly upright. The bellows must not fall past the guide line within one minute. If it does: •...

  • Page 40: Assemble The Breathing System

    Aespire 7900 6. If the result for all the bellows assembly tests was “passed,” complete the assembly of the breathing system. Assemble the breathing system 1. Replace the exhalation valve assembly as shown. Tighten the two thumbscrews. 2. Turn over the bellows base assembly. Replace the boot. Be sure to insert it correctly into the ports as shown by the arrows.
  • Page 41 2 Cleaning and Sterilization 3. Replace the diaphragm. 4. Insert the ramp tabs (1) into the slots (2). Rotate the ramp until it locks at (3). 5. On the manifold assembly, press the check valves circuit lens (1) down onto the latches (2) to lock the lens. 2-19 1009-0633-000...
  • Page 42 Aespire 7900 6. Insert the breathing circuit module into the bellows assembly aligned as shown. 7. Rotate the breathing circuit module at the point shown by the dotted line to attach it to the bellows assembly. 8. Make sure the o-ring (3) is on the O sensor.
  • Page 43 2 Cleaning and Sterilization 10. Attach the flow sensor module to the breathing system. 11. Push the latch (1) to lock the flow sensor module onto the breathing system. 2-21 1009-0633-000...

  • Page 44: Install The Breathing System

    Aespire 7900 12. This is assembled breathing system. Install the breathing system 1. Locate guide pin openings 1 and 2. 2. Align opening 1 onto the guide pin 1, then align opening 2 onto guide pin 2-22 1009-0633-000...

  • Page 45: Remove The Agss Receiver

    2 Cleaning and Sterilization 3. Holding the rear handle (1) and the latch handle (2) as shown, slide the breathing system onto the guide pins. 4. Use the grip under the latch handle to push the breathing system in fully until it latches firmly.

  • Page 46: Remove The Agss Receiver Filter

    Aespire 7900 2. Slide the side panel out by removing its tabs from their slots (1). 3. Loosen the thumbscrew and remove the reservoir (2). It is not autoclavable. 4. Loosen the thumbscrew (1) and lower the receiver to remove it.

  • Page 47: Absorber Canister

    2 Cleaning and Sterilization 1. Pull the flexible gasket (1) from the receiver. 2. Pull the filter (1) out of its holder (2). 3. Do these steps in the opposite order to replace the filter and gasket after autoclaving the receiver and gasket. Be sure the gasket is firmly pressed into place at all points.

  • Page 48: Mechanical Cleaning In Washer Or Washer-Disinfector

    Turn the cover locking ring clockwise to lock the cover in place. Ensure cover is properly sealed to prevent leaks and spillage. Alignment of arrows helps to indicate correct assembly. 6. Datex-Ohmeda recommends that manual cleaning is always followed by a high level disinfection. High level disinfection 1.
  • Page 49 3 User Maintenance w WARNING To help prevent fires: • Only use lubricants approved for anesthesia or O equipment, such as Krytox. • Do not use lubricants that contain oil or grease. They burn or explode in high O concentrations. •...

  • Page 50: Repair Policy

    Contact your local Datex-Ohmeda Field Service Representative for service assistance. In all cases, other than where Datex-Ohmeda’s warranty is applicable, repairs will be made at Datex-Ohmeda’s current list price for the replacement part(s) plus a reasonable labor charge. Maintenance summary and schedule These schedules are the minimum frequency based on typical usage of 2000 hours per year.

  • Page 51: Datex-Ohmeda Approved

    N N N N o o o o t t t t e e e e : : : : This is the minimum level of maintenance recommended by Datex-Ohmeda. Local regulations may contain additional maintenance requirements. Datex-Ohmeda advocates compliance with local regulations which meet or exceed this minimum level of maintenance.

  • Page 52: Breathing System Maintenance

    Aespire 7900 Breathing system maintenance When cleaning the breathing system, replace any parts that are visibly cracked, chipped, distorted or worn. Refer to the appropriate section for reassembly and tests. sensor replacement w WARNING Handle and dispose of sensors according to your biohazard policies.

  • Page 53: O 2 Sensor Calibration

    3 User Maintenance 4. Make sure the o-ring (1) is on the sensor. Install the replacement O sensor. Reconnect the O sensor cable. 5. Replace the flow sensor module on the system and press the latch (1) in to secure the module. sensor calibration w WARNING Do not perform calibration while unit is connected to a patient.
  • Page 54 Aespire 7900 Step 1 Push the Menu key to see the main menu. Step 2 Turn the knob to select the Calibration screen. Step 3 Push the knob to show the next screen. Step 4 Turn and push the knob to select O Sensor Cal.
  • Page 55 3 User Maintenance Step 6 Complete the steps shown on the screen. To remove the O sensor from the circuit: • Pull the latch (1) to unlock the flow sensor module from the breathing system. • Pull the flow sensor module (2) from the breathing system.
  • Page 56 Aespire 7900 Step 7 Select Start Cal and push the knob to start calibration. • The screen shows “ C C C C a a a a l l l l i i i i b b b b r r r r a a a a t t t t i i i i n n n n g g g g ” during the procedure.

  • Page 57: 100% O

    3 User Maintenance 100% O sensor This procedure takes three minutes or less. calibration You must complete the 21% calibration before you can select the 100% calibration. w WARNING Do not perform calibration while unit is connected to a patient. Step 11 Turn then push the knob to select O...
  • Page 58 Aespire 7900 The screen shows ‘Calibrating ... ‘, followed by the result: ‘Complete’ or ‘Failure’. If the calibration fails, • do it again or • decrease the airway pressure. Then try again. After repeated failures replace the O sensor and re-calibrate at 21%.

  • Page 59: Flow Sensor Zeroing

    3 User Maintenance Flow sensor zeroing wWARNING Do not perform calibration while unit is connected to a patient. The system automatically corrects for zero offset when you unplug the flow sensor connectors with power on. You must stop mechanical ventilation before you calibrate the flow sensors.

  • Page 60: How To Prevent Water Build-Up

    Aespire 7900 How to prevent water build-up Why is water buildup a Pooled water in the flow sensor or water in the sensing lines causes false alarms. problem? How much water is Small beads of water or a foggy appearance in the flow sensors is OK.
  • Page 61 4 Alarms and Troubleshooting w CAUTION No repair should ever be attempted by anyone not having experience in the repair of devices of this nature. In this section About alarms ..........4-2 Alphabetical list .

  • Page 62: About Alarms

    Aespire 7900 About alarms w WARNING If an alarm occurs, safeguard the patient first, before troubleshooting or repair procedures. Two areas on the screen show alarms. The area at the top of the display shows most alarms. If there are more than 4 alarms at the same time, the lower priority alarms cycle every two seconds.
  • Page 63 4 Alarms and Troubleshooting Alarm messages have three general causes. • Malfunctions: Some malfunctions cause reduced function (for example, no PEEP). Others prevent mechanical ventilation (Minimum shutdown). • Patient monitoring: These are high and low limit settings that you adjust. •...

  • Page 64: Alphabetical List

    Aespire 7900 Alphabetical list The instructions in this section tell you what you can do: • During a case to protect the patient • After the case to repair a problem This table does not include operator instructions. There are two special types of alarms: •...
  • Page 65 4 Alarms and Troubleshooting Message Priority Cause Action/Concerns Repair Aux Gas Outlet On Medium The outlet selection switch is Connect the patient circuit to the - - - (low after set to the auxiliary common auxiliary outlet. For mechanical acknowledged) gas outlet.
  • Page 66 Aespire 7900 Message Priority Cause Action/Concerns Repair Check Flow Sensors Medium No flow or negative flow on Are the flow sensors correctly Inspect one way valves (low after inspiratory sensor during installed? (breathing circuit acknowledged) inspiration in a circle system module).
  • Page 67 4 Alarms and Troubleshooting Message Priority Cause Action/Concerns Repair High O Medium % > alarm high limit Is the limit set correctly? What is Calibrate O sensor. the O flow? setting. Replace O sensor. Did you just push Flush? Does the sensor see 21% O in room air?
  • Page 68 Aespire 7900 Message Priority Cause Action/Concerns Repair Limit Task Light Use The system is running on Turn off the light to extend - - - battery power. Turn off the battery backup. light to save power. Loss of Backup Medium The audio alarm will not Monitor system operation.
  • Page 69 4 Alarms and Troubleshooting Message Priority Cause Action/Concerns Repair Memory (EEPROM) The system cannot access Default settings are used. Contact a qualified Fail some stored values. Ventilation is still possible but service representative. service is necessary. Memory (flash) Minimum Ventilator malfunction. Ventilate manually.
  • Page 70 Aespire 7900 Message Priority Cause Action/Concerns Repair Flush Failure The pressure switch that This alarm occurs if you hold If the alarm occurs detects flush flow has seen a down the Flush button for more when flush is not in very long flush (≥30...
  • Page 71 4 Alarms and Troubleshooting Message Priority Cause Action/Concerns Repair Pressure Limit Switch Minimum A pressure safety switch Ventilate manually. Monitoring is Contact a qualified Failure monitoring activated at a Paw <90 still available. Extreme control service representative. (Medium) O and Pmanifold <80 combinations may cause this alarm.
  • Page 72 Aespire 7900 Message Priority Cause Action/Concerns Repair Volume Apnea Medium No mechanical breaths or Check patient. Bag as needed. - - - spontaneous breaths >20 Check for disconnects. If the mL in last 30 seconds. patient is on a heart lung machine, select Cardiac Bypass on the main menu.

  • Page 73: Breathing System Problems (No Alarm)

    4 Alarms and Troubleshooting Breathing system problems (no alarm) Symptom Problem Solution(s) Gas scavenging flow is too low. Suction supply problem. Use a different suction supply. Filter blockage. Active systems Replace the filter. Refer to have a flow indicator to show “Remove the AGSS receiver this.

  • Page 74: Electrical Problems (Power Failure, Etc.)

    Aespire 7900 Electrical problems (power failure, etc.) w WARNING If a circuit breaker opens frequently, do not use the system. Have a qualified service representative repair the system Symptom Problem Solution Mains indicator is not ON. The electrical power cable Connect the power cable.
  • Page 75 4 Alarms and Troubleshooting 1. Inlet Circuit Breaker* 2. Mains Indicator 3. Outlet CIrcuit Breakers* 4. Open (No power) 5. Closed (OK) * Labels show ratings. Figure 4-1 • Circuit breakers and the mains indicator 4-15 1009-0633-000...

  • Page 76: Pneumatic Problems

    Aespire 7900 Pneumatic problems Symptom Problem Solution High-pressure leak test Controls are not set correctly. Set the system switch to fails. Standby and the auxiliary flowmeter to OFF. Incorrect cylinder connection (cylinder Make sure that there is only yokes). one cylinder gasket, the gasket is in good condition, and the T- handle is tight.

  • Page 77: Alarm Settings Range And Default Values

    4 Alarms and Troubleshooting Alarm settings range and default values Setting Range Increment Default Low O 18-99% High O 21-99%, Off Low VE Off, 0.1-10 L/min 0.1 L/min 2.0 L High VE 0.5-30, off L/min 0.5 L/min 10.0 L Low VTE Off, 5-1500 mL 5 mL if <20 mL, 20 otherwise...
  • Page 78 Aespire 7900 4-18...
  • Page 79 5 Parts In this section This section lists user-replaceable parts only. For other components, refer to the Technical Reference manual. Flow sensor module ..........5- 2 Breathing circuit module .

  • Page 80: Flow Sensor Module

    Aespire 7900 Flow sensor module Item Description Stock number Flow sensor module (does not include flow sensors) 1407-7001-000 Flow sensor cover 1407-3000-000 Flow sensor cuff 1407-3004-000 Flow sensor, disposable (plastic) 1503-3856-000 Flow sensor, autoclavable (metal) 1503-3244-000 1009-0633-000...

  • Page 81: Breathing Circuit Module

    5 Parts Breathing circuit module Item Description Stock number Breathing circuit module (does not include O cell, 1407-7002-000 O-ring, or cable) Check valves circuit lens 1407-3101-000 Check valve assembly 1406-8219-000 O-ring for O cell 1406-3466-000 cell 6050-0004-110 Cable, O cell 1009-5570-000 –...

  • Page 82: Bellows

    Aespire 7900 Bellows Item Description Stock number Bellows housing 1500-3117-000 Bellows 1500-3378-000 1500-3351-000 Pressure relief valve assembly 1500-3377-000 Latch, rim 1500-3352-000 Manifold, bellows base 1407-3702-000 Bellows base with latch 1407-7006-000 Seal, base 1500-3359-000 – Diaphragm, APL 1406-3331-000 – Poppet, APL valve 1406-3332-000 –...

  • Page 83: Absorber Canister

    5 Parts Absorber canister Item Description Stock number Multi absorber, reusable (includes 40 pack of foam) 1407-7004-000 (does not include absorbent) Cover assembly, CO canister 1009-8240-000 Foam, CO canister (pack of 40) 1407-3201-000 O-ring 1407-3204-000 Canister, CO , with handle 1407-3200-000 –...

  • Page 84: Exhalation Valve Assembly

    Aespire 7900 Exhalation valve assembly Description Stock number Exhalation valve assembly 1407-7005-000 1009-0633-000...

  • Page 85: Agss

    5 Parts AGSS Description Stock number Common Cap 3.18 barb silicone 1406-3524-000 Connector, inlet 30 mm male to 19 mm male M1003134 Connector, inlet 30 mm male to 30 mm male M1003947 O-ring for connector, 21.95 ID 1406-3558-000 O-ring for receiver, 22 ID 1407-3104-000 O-ring for thumbscrews, 4.47 ID 1407-3923-000...

  • Page 86: Test Tools And System Parts

    Aespire 7900 Test tools and system parts Description Stock number Cylinder gasket (pin indexed cylinders only) 0210-5022-300 Cylinder wrench (DIN 477 and high-pressure hose) 1202-3651-000 Cylinder wrench for pin-indexed cylinder 0219-3415-800 DIN O plug (cylinder connection) 1202-7146-000 Handle for yoke tee...
  • Page 87 6 Specifications and Theory of Operation N N N N o o o o t t t t e e e e : : : : All specifications are nominal and subject to change without notice. In this section System pneumatic circuits ........6-2 System specifications .

  • Page 88: System Pneumatic Circuits

    Aespire 7900 System pneumatic circuits Figure 6-1 • Pneumatic circuit diagram 1009-0633-000...
  • Page 89 6 Specifications and Theory of Operation Figure 6-1 legend Auxiliary O , 0-10 LPM (optional) 41. 5.5 psi pressure relief valve flush 42. Popoff valve Gauge 43. Exhalation valve (2.0 cm H O bias) P-Line 44. 10 cm H 110 psi relief 45.

  • Page 90: Gas Supplies

    Aespire 7900 Gas supplies Gas goes into the system through a pipeline or cylinder connection. All connections have indexed fittings, filters, and check (one-way) valves. Gauges show the cylinder and pipeline pressures. A regulator decreases the cylinder pressures to the appropriate system pressure.

  • Page 91: Mixed Gas

    6 Specifications and Theory of Operation Mixed gas The mixed gas goes from the flowmeter outlet through the vaporizer that is ON, to the fresh gas outlet, and into the breathing system. A pressure relief valve sets the maximum outlet pressure. System specifications Pneumatic Gas supplies...

  • Page 92: Electrical Power

    Aespire 7900 Scale (two flow tubes) 0.05 -0.95 L/min 1-15 L/min Accuracy: At 20 ° C with gas supply pressures at 345 kPa (50 psi) and an outlet pressure of 101.3 kPa (absolute) (14.7 psi) flowmeter accuracy agrees with VDE 3513 Part 3, Accuracy Class 2.5 or better.

  • Page 93: Power Cord

    Only Datex-Ohmeda service representatives are to replace the battery. Contact a Datex-Ohmeda service representative to disconnect the battery if the equipment is not likely to be used for some time. Batteries must be disposed of in accordance with applicable regulatory requirements in effect at the time and place of disposal.

  • Page 94: Electromagnetic Compatibility

    Aespire 7900 Electromagnetic compatibility Changes or modifications to this equipment not expressly approved by Datex- Ohmeda could cause EMC issues with this or other equipment. Contact Datex- Ohmeda for assistance. This device is designed and tested to comply with applicable regulations regarding EMC as follows.

  • Page 95: Guidance And Manufacturer's Declaration - Electromagnetic Emissions

    6 Specifications and Theory of Operation w WARNING An operator of the medical electrical system must not touch non- medical electrical equipment and the patient simultaneously. This may cause an unsafe electrical shock to the patient. Guidance and The system is suitable for use in the specified electromagnetic environment. The customer and/or the user of the system should assure that it is used in an manufacturer's electromagnetic environment as described below.
  • Page 96 Aespire 7900 Immunity test IEC 60601-1-2 test level Compliance level Electromagnetic environment guidance Power frequency 3 A/m 3 A/m If display distortion or other abnormalities occur, it (50/60 Hz) may be necessary to position the S/5 Aespire magnetic field Anaesthetic System further from sources of power...
  • Page 97 6 Specifications and Theory of Operation IEC 60601-1-2 Compliance Electromagnetic environment Immunity test Test Level level guidance Portable and mobile RF communications equipment should be used no closer to any part of the system, including cables, than the recommended separation distance calculated from the equation appropriate for the frequency of the transmitter.

  • Page 98: Recommended Separation Distances

    Aespire 7900 Recommended separation distances Between portable and mobile The system is intended for use in the electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of the RF communications system can help prevent electromagnetic interference by maintaining a...
  • Page 99 6 Specifications and Theory of Operation Figure 6-2 • Electrical block diagram 6-13 1009-0633-000...
  • Page 100 Aespire 7900 Figure 6-2 legend Inside Anesthesia System Power cord AC inlet with breaker and line filter Isolation transformer Inrush board Fuses Line filter Outlet box Universal power supply Battery, 12 V Integrated CPU board On/Standby switch supply switch Task light switch...

  • Page 101: Physical Specifications

    6 Specifications and Theory of Operation Physical specifications All specifications are approximate values and can change without notice. wCAUTION Do not subject the S/5 Aespire to excessive shock and vibration. wCAUTION Do not place excessive weight on flat surfaces or drawers. System Height 136 cm (53.5 in)

  • Page 102: Breathing System Specifications

    Aespire 7900 Breathing system specifications General V V V V o o o o l l l l u u u u m m m m e e e e 4600 mL including bellows A A A A b b b b s s s s o o o o r r r r b b b b e e e e n n n n t t t t...

  • Page 103: Gas Scavenging

    6 Specifications and Theory of Operation Pressure generated by a wet unidirectional valve: 0.81 cm H Breathing system leakage (average during use): Pressure Bag Mode (mL/min) Vent Mode (mL/min) 30 cm H 60 cm H 90 cm H APL Valve: Approximately 0 to 70 cm H Pressure Flow Data (APL Valve Completely Open): APL Pressure cm H Flow (L/min)

  • Page 104: Ventilator Theory

    Aespire 7900 Ventilator theory General The ventilator pneumatics are at the rear of the breathing system. A precision valve controls gas flow to the patient. During inspiration, this gas flow closes the exhalation valve and pushes the bellows down. During expiration, a small flow pressurizes the exhalation diaphragm to supply PEEP pressure.

  • Page 105: Modes

    6 Specifications and Theory of Operation Modes The system has four modes of mechanical ventilation: • Volume control mode • Pressure control mode • Synchronized intermittent volume (SIMV) mode (optional) • Pressure support ventilation (PSVPro) mode (optional) Use the main menu to set the mode. Figure 6-4 •...
  • Page 106 Aespire 7900 Pressure control mode Figure 6-6 • Pressure control diagram Pressure control supplies a constant set pressure during inspiration. The ventilator calculates the inspiratory time from the frequency and I:E ratio settings. A high initial flow pressurizes the circuit to the set inspiratory pressure.
  • Page 107 6 Specifications and Theory of Operation At the specified time interval, the ventilator will wait for the next inspiratory effort from the patient. The sensitivity of this effort is adjusted using the flow trigger level. When the ventilator senses the beginning of inspiration it synchronously delivers a volume breath using the set tidal volume, and inspiratory time that is set on the ventilator.

  • Page 108: Minimum Monitoring

    Aespire 7900 An apnea backup mode is provided in the event the patient stops breathing. When setting the backup mode the user adjusts the inspiratory pressure (Pinsp), respiratory rate and the inspiratory time (Tinsp). As long as the patient triggers the ventilator within the set apnea delay time, the patient will get pressure-supported breaths and the ventilator will not deliver machine breaths.

  • Page 109: Ventilation Operating Specifications

    6 Specifications and Theory of Operation Volume control settings • V (tidal volume) • Rate • I:E • P limit • PEEP Limited inspired pressure • Selecting Pressure mode generates a pressure plateau linked to the setting. mode inspired • While observing the monitored P value, the user adjusts P until inspired...
  • Page 110 Aespire 7900 Fresh gas compensation Flow compensation range: 200 mL/min to 15 L/min Gas composition: O, Air, Anesthetic Agents Pressure Patient airway pressure range: -20 to +120 cm H Patient airway display range: -20 to +120 cm H High pressure alarm set range:...
  • Page 111 6 Specifications and Theory of Operation Oxygen Display range: 5 to 110% O Display resolution: 1% increments Sensor type: Galvanic fuel cell Measurement range: 0 to 100% O Measurement accuracy: ± 3% of full scale Cell response time: 35 seconds, 10 - 90% Response time of cell and adapter as measured using the test method described in ISO 7767 (1988-12-15), clause 50.9...

  • Page 112: Ventilator Accuracy Data

    Aespire 7900 Ventilator accuracy data The following accuracy data are based on patient conditions and settings described in ASTM F1101. The ventilator is assumed to be operating in volume mode, with 100 percent oxygen in the breathing system; or, it is connected to an anesthesia gas analyzer.
  • Page 113 6 Specifications and Theory of Operation Gas composition related errors > +10% > ± 5% > -10% Note Gas composition errors may be in addition to the above normalized accuracy. When adding errors, positive errors can have the effect of nulling out negative errors.

  • Page 114: Suction Regulators (Optional)

    Aespire 7900 Suction regulators (optional) Venturi suction Supply: Air or O from system gas supply regulator Drive gas consumption: 75 L/min Maximum Vacuum: 57 mm Hg with pipeline drive gas at 345 kPa (50 psi) Minimum flow: 20 L/min Accuracy: ±5% of full scale...
  • Page 115 Index Alarm priority 4-2 Krytox 3-3, 2-15 apnea backup mode 6-22 assembled breathing system 2-22 autoclavable 2-3 leakage current 1-7 backup power 6-7 Malfunctions 4-3 bag hose 2-6 mechanical ventilation 6-19 bag port 2-6 medical grade gas supplies 1-7 Medisorb 1-4 modifications to this equipment 6-8 Calibration screen 3-6 chain linkage 6-4...
  • Page 116 Aespire 7900 1009-0633-000...
  • Page 117 Warranty This Product is sold by Datex-Ohmeda under the warranties set forth in the following paragraphs. Such warranties are extended only with respect to the purchase of this Product directly from Datex-Ohmeda or Datex-Ohmeda’s Authorized Dealers as new merchandise and are extended to the Buyer thereof, other than for the purpose of resale.
  • Page 118 Aespire 7900 User’s Reference Manual, English Part 2 1009 0633 000 10 04 A 01 21 03 Printed in USA ©Datex-Ohmeda, Inc. All rights reserved...

Table of Contents